package com.guoxin.chapter3;

/**
 * @author guoxin
 * @date 2019/9/22
 */
public class OldObject {

    private static final int _1MB = 1024 * 1024;

    /**
     * VM参数：-verbose:gc -Xms20M -Xmx20M -Xmn10M -XX:SurvivorRatio=8
     */
    public static void testPretenureSizeThreshold() {
        byte[] allocation1, allocation2, allocation3;
        allocation1 = new byte[_1MB / 4];
        // 什么时候进入老年代取决于XX:MaxTenuringThreshold设置
        allocation2 = new byte[4 * _1MB];
        allocation3 = new byte[4 * _1MB];
        allocation3 = null;
        allocation3 = new byte[4 * _1MB];
    }

    public static void main(String[] args) {
        testPretenureSizeThreshold();
    }
}
